CN201326790Y - Hydraulic damper for resisting exhaust counterforce of safety valve - Google Patents
Hydraulic damper for resisting exhaust counterforce of safety valve Download PDFInfo
- Publication number
- CN201326790Y CN201326790Y CNU2008202145908U CN200820214590U CN201326790Y CN 201326790 Y CN201326790 Y CN 201326790Y CN U2008202145908 U CNU2008202145908 U CN U2008202145908U CN 200820214590 U CN200820214590 U CN 200820214590U CN 201326790 Y CN201326790 Y CN 201326790Y
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- piston
- piston rod
- oil cylinder
- oil
- rear end
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Abstract
The utility model discloses a hydraulic damper for resisting exhaust counterforce of a safety valve. An oil cylinder, a front end cover and a rear end cover are connected into one by a thread connecting assembly; a piston and a piston rod are arranged in the oil cylinder, a bearing support is connected at the front end part of the piston rod, a fixed support is connected on the rear end cover, a control valve core is arranged at the connecting position between the piston and the piston rod, a valve core spring is arranged between the control valve core and the piston, an oil through pipeline is arranged in the piston rod, a pipe line is arranged on the piston, a blind hole is arranged on the control valve core, and damping holes are vertically arranged at the two sides of with the blind hole. Liquid oil can flow in the oil cylinders at the two sides of the piston via the oil pipeline, the blind hole, the damping holes and the pipe line on the piston. When displacement is incurred due to expansion and contraction of the pipeline or equipment, the hydraulic damper cannot generate damping force; at the exhaust moment when the safety valve jumps up, the control valve core of the damper is locked, so as to lead the damper to adopt the approximately rigid structure, thereby achieving the purpose of protecting the pipeline and the equipment.
Description
Technical field
The utility model relates to a kind of anti-safety valve steam discharge counter-force hydraulic damper.
Background technique
On boiler, pressurized container and high pressure pipe line; safety valve generally all is installed is used for protection equipment and pipeline; anti-locking system is owing to security incident takes place overpressure; when the outside exhaust of safety valve jumping up; can produce bigger steam discharge reaction force to blow-off line or equipment; before hydraulic damper is not extensive use of; method commonly used is that the structural strength that a rigid mechanism is strengthened pipeline or equipment is set near safety valve; but so also limited simultaneously the displacement that pipeline or equipment produce when expanding with heat and contract with cold, increased the internal stress of pipeline or equipment.Gradually adopt hydraulic damper to substitute rigid mechanism in recent years, the slow displacement that damper produces expanding with heat and contract with cold is insensitive, does not produce damping force, only be subjected to the steam discharge counter-force, when damper piston speed increases suddenly, damper just can become rigidity.General hydraulic damper all is designed to two-way anti-vibration when design, it is mainly by the master cylinder that produces damping force, replenishing and store the oil storage cylinder of hydraulic oil and the valve group of control tension and compression both direction flow keying forms, when damper is used for anti-safety valve steam discharge, because the steam discharge counter-force is always downward, damper only need work in one direction and get final product, general anti-safety valve steam discharge commonly used just only is equipped with spool with hydraulic damper in a valve group, the damper of other parts and anti-vibration is in full accord, this hydraulic damper needs two oil cylinders and two control valve groups, structure is complicated, part processing precision requires high, product price is more expensive, and user cost is higher.
The model utility content
The technical problems to be solved in the utility model is: a kind of anti-safety valve steam discharge counter-force hydraulic damper is provided; it can expand with heat and contract with cold at pipeline or equipment and not produce damping force when producing displacement; and in the locking of safety valve jumping up steam discharge moment Damper Control spool; make damper become approximate rigid construction; thereby reach the purpose of protection pipeline or equipment; at the one-way of safety valve steam discharge counter-force, simplify damper structure simultaneously, reduce manufacture cost.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of anti-safety valve steam discharge counter-force hydraulic damper, has oil cylinder, the oil cylinder two ends are respectively arranged with front cover and rear end cover, by screwed assembly with oil cylinder, it is an integral body that front cover and rear end cover are connected and fixed, be provided with piston and piston rod in the oil cylinder, be movably set with the oil return piston in the oil cylinder between piston and rear end cover, be provided with pressure spring between oil return piston and the rear end cover, the pressure spring two ends are withstood oil return piston and rear end cover respectively, the piston rod front end passes front cover and stretches out oil cylinder and be connected with the carrying bearing, be connected with fixed bearing by the spreading base on the rear end cover, piston is fixedlyed connected with piston rod, during connection, the piston rod rearward end puts in the piston and is connected with piston, the piston rod rearward end has cavity, be movably set with the control spool in the cavity, be provided with valve core spring between control spool and the piston, be provided with the oil pipe road in the piston rod, piston is provided with pipeline and is communicated with the cavity of piston rod rearward end, on the control spool, have blind hole, the blind hole both sides are vertically installed with damping hole, have the in-oil cylinder fluid of tailpiece of the piston rod can be in piston rod the oil pipe road, blind hole and damping hole on the control spool flow in the oil cylinder at oil return piston place from the pipeline on the piston.
Stable for guaranteeing that piston rod moves, in being arranged, the oil cylinder of tailpiece of the piston rod is provided with guide sleeve, guide sleeve is connected with front cover, piston rod passes guide sleeve and front cover stretches out outside the oil cylinder, described control spool adopts cone valve structure, can realize the better latch effect of oil circuit is had air outlet hole in addition, and blocks this air outlet hole by screw on the oil return piston.
The beneficial effects of the utility model are: the utility model is simple in structure, safe and reliable, the characteristics of damper single load bearing when sending vapour at safety valve, only need an oil cylinder and one to form the control valve group and just can satisfy usage requirement by control spool and valve core spring, reduced product parts quantity, reduce the difficulty of processing of component, also helped the reduction of cost of production simultaneously.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the enlarged diagram at A place among Fig. 1.
Among the figure: 1. oil cylinder 2. front covers 3. rear end covers 4. screwed assemblies 5. piston 5-1. pipelines 6. piston rod 6-1. cavity 6-2. oil pipe roads 7. guide sleeves, 8. carrying bearings, 9. oil return piston 9-1. air outlet holes, 10. pressure springs, 11. screws, 12. fixed bearings 13. are controlled spool 13-1. blind hole 13-2. damping holes 14. valve core springs 15. spreading bases
Embodiment.
The present concrete enforcement further instruction of in conjunction with the accompanying drawings the utility model being done.These accompanying drawings are the schematic representation of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
A kind of anti-safety valve steam discharge counter-force hydraulic damper as shown in Figure 1, has oil cylinder 1, oil cylinder 1 two ends are respectively arranged with front cover 2 and rear end cover 3, by screwed assembly 4 with oil cylinder 1, it is an integral body that front cover 2 and rear end cover 3 are connected and fixed, be provided with piston 5 and piston rod 6 in the oil cylinder 1, piston 5 is fixedlyed connected with the rearward end of piston rod 6, in the oil cylinder 1 that piston rod 6 ends are arranged, be provided with guide sleeve 7, guide sleeve 7 is connected with front cover 2, the front end of piston rod 6 passes guide sleeve 7 and front cover 2 stretches out outside the oil cylinder 1, and be connected with the carrying bearing 8 that has joint shaft bearing, can be connected with load assembly, be movably set with oil return piston 9 in the oil cylinder 1 between piston 5 and rear end cover 3, be provided with pressure spring 10 between oil return piston 9 and the rear end cover 3, pressure spring 10 two ends are withstood oil return piston 9 and rear end cover 3 respectively, have air outlet hole 9-1 on the oil return piston 9, and block this air outlet hole 9-1 by screw 11, be connected with by spreading base 15 on the rear end cover 3 and have joint shaft bearing fixed bearing 12, can be connected with fixed structure piece.
As shown in Figure 2, when piston 5 is fixedlyed connected with piston rod 6, piston rod 6 rearward end put in the piston 5 and are connected with piston 5, piston rod 6 rearward end have cavity 6-1, being movably set with head in the cavity 6-1 is the control spool 13 of cone structure, be provided with valve core spring 14 between control spool 13 and the piston 5, control spool 13 and valve core spring 14 are formed a control valve group, be provided with oil pipe road 6-2 in the piston rod 6, piston 5 is provided with pipeline 5-1 and is communicated with the cavity 6-1 of piston rod 6 rearward end, on control spool 13, have blind hole 13-1, the blind hole both sides respectively are vertically installed with a damping hole 13-2, have fluid in the oil cylinder 1 of piston rod 6 ends can be in piston rod 6 oil pipe road 6-2, blind hole 13-1 and damping hole 13-2 on the control spool 13 flow in the oil cylinder 1 at oil return piston 9 places from the pipeline 5-1 on the piston 5.
During use, when the pipe-line equipment on being connected damper is not subjected to impact of safety valve steam discharge counter-force or the displacement of pipe-line equipment normal heat, the elastic force of valve core spring 14 suppresses control spool 13, make control spool 13 be in normal open state, fluid can be in piston rod 6 oil pipe road 6-2, blind hole 13-1 and the pipeline 5-1 on damping hole 13-2 and the piston 5 on the control spool 13 flow between the oil cylinder 1 at oil cylinder 1 that piston rod 6 ends are arranged and oil return piston 9 places smoothly, because the variation of the mobile piston 5 both sides oil cylinders 1 inner fluid volume that is produced of fluid is compensated by the distortion of pressure spring 10, this moment, damper did not produce damping force; When pipe-line equipment is subjected to the impact of safety valve steam discharge counter-force; oil pressure moment increase in the oil pipe road 6-2; cause damping hole 13-2 both sides because the different pressure that produce of oil pressure; when pressure is controlled the active force of spool 13 greater than 14 pairs of valve core springs; control spool 13 compression valve core springs 14 and the pipeline 5-1 direction on piston 5 move; block the pipeline 5-1 on the piston 5; thereby the flow channel of closure piston 5 both sides oil cylinders 1 inner fluid; at this moment; piston 5 both sides oil cylinders 1 inner fluid can't free-flow; piston 5 and piston rod 6 have been produced very big damping force; make damper become approximate rigid construction, reach the displacement that stops pipe-line equipment thus, absorb vibration; the restriction amplitude, the purpose of protection pipe-line equipment.
According to the description of above-mentioned mode of execution, the related work personnel can carry out various change and modification fully in the scope that does not depart from the utility model technological thought.Technical scope of the present utility model is not limited to the content on the specification, must determine its technical scope according to the claim scope.
Claims (4)
1. anti-safety valve steam discharge counter-force hydraulic damper, has oil cylinder (1), oil cylinder (1) two ends are respectively arranged with front cover (2) and rear end cover (3), by screwed assembly (4) with oil cylinder (1), it is an integral body that front cover (2) and rear end cover (3) are connected and fixed, be provided with piston (5) and piston rod (6) in the oil cylinder (1), be movably set with oil return piston (9) in the oil cylinder (1) between piston (5) and rear end cover (3), be provided with pressure spring (10) between oil return piston (9) and the rear end cover (3), pressure spring (10) two ends are withstood oil return piston (9) and rear end cover (3) respectively, piston rod (6) front end passes front cover (2) and stretches out oil cylinder (1) and be connected with carrying bearing (8), rear end cover (3) is gone up and is connected with fixed bearing (12) by spreading base (15), it is characterized in that: piston rod (6) rearward end puts in the piston (5) fixedlys connected with piston (5), piston rod (6) rearward end has cavity (6-1), be movably set with control spool (13) in the cavity (6-1), be provided with valve core spring (14) between control spool (13) and the piston (5), be provided with oil pipe road (6-2) in the piston rod (6), piston (5) is provided with pipeline (5-1) and is communicated with cavity (6-1), on control spool (13), have blind hole (13-1), blind hole (13-1) both sides are vertically installed with damping hole (13-2), and the interior fluid of oil cylinder (1) that has piston rod (6) to hold can be in piston rod (6) oil pipe road (6-2), blind hole (13-1) and damping hole (13-2) on the control spool (13) flow in the oil cylinder (1) at oil return piston (9) place from the pipeline (5-1) on the piston (5).
2. anti-safety valve steam discharge counter-force hydraulic damper according to claim 1, it is characterized in that: be provided with guide sleeve (7) in the described oil cylinder (1) that has piston rod (6) to hold, guide sleeve (7) is connected with front cover (2), and piston rod (6) passes guide sleeve (7) and front cover (2) stretches out outside the oil cylinder (1).
3. anti-safety valve steam discharge counter-force hydraulic damper according to claim 1, it is characterized in that: described control spool (13) is a cone valve structure.
4. anti-safety valve steam discharge counter-force hydraulic damper according to claim 1 is characterized in that: have air outlet hole (9-1) on the described oil return piston (9), and block this air outlet hole (9-1) by screw (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202145908U CN201326790Y (en) | 2008-12-16 | 2008-12-16 | Hydraulic damper for resisting exhaust counterforce of safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202145908U CN201326790Y (en) | 2008-12-16 | 2008-12-16 | Hydraulic damper for resisting exhaust counterforce of safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201326790Y true CN201326790Y (en) | 2009-10-14 |
Family
ID=41178763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202145908U Expired - Fee Related CN201326790Y (en) | 2008-12-16 | 2008-12-16 | Hydraulic damper for resisting exhaust counterforce of safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201326790Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090105A (en) * | 2013-01-29 | 2013-05-08 | 河海大学常州校区 | Valve buffer |
-
2008
- 2008-12-16 CN CNU2008202145908U patent/CN201326790Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090105A (en) * | 2013-01-29 | 2013-05-08 | 河海大学常州校区 | Valve buffer |
| CN103090105B (en) * | 2013-01-29 | 2015-10-28 | 河海大学常州校区 | Valve buffer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20131216 |